* {
  padding: 0;
  margin: 0;
}
html,
body {
  height: 100%;
  width: 100%;
}

.box {
  /* display: flex;
  justify-content: center;
  align-items: center; */
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.box > .smallBox,
.box > .bigBox {
  position: relative;
  width: 300px;
  height: 300px;
  border: 1px solid #000;
  min-width: 300px;
}
.box > .smallBox > .mask {
  display: none;
  position: absolute;
  left: 0;
  top: 0;
  width: 150px;
  height: 150px;
  background-color: rgba(0, 0, 0, 0.5);
}
.box > .smallBox > img {
  width: 100%;
}

.box > .bigBox {
  display: none;
  position: absolute;
  top: 0;
  left: 300px;
  overflow: hidden;
}

.box > .bigBox > img {
  width: 300%;
}

.box_pics {
  /* position: absolute;
  left: 50%;
  transform: translate(-50%); */
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 300px;
  margin: 20px auto;
}
.box_pics img {
  width: 73.5px;
  height: 75px;
  border: 1px solid transparent;
}

.box_pics img:hover {
  border: 1px solid #000;
}
